Question

if angleA and Angle B are acute angles such that cos A = cos B then show that angle A = Angle B


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Answer 1

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# SAEM ALI RIZVI
# BE BRAINLY

Answer 2

$in \: a \: right \: triangle \: abc =90 degree \\ \cos(a) = \frac{ac}{ab} \\ cos(b) = \frac{bc}{ab} \\ \cos(a = \cos(b) \\ \frac{ac}{ab} = \frac{bc}{ab} \\ ac = bc \\ \\ so \: opposite \: side \: angle \: are \: equal \\ \: a \: and \: b = 45degree$